Two-dimensional MUSIC (multiple signal classification) direction-detecting device for uniform circular array

A technology of direction finding device and uniform circular array, which is applied in directions such as direction finders using electromagnetic waves, and can solve problems such as high computational complexity

Inactive Publication Date: 2012-06-27
HUAZHONG UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

Therefore, high-speed digital signal processing devices are often used to complete these calculations with relatively high computational complexity to obtain the target orientation.

Method used

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  • Two-dimensional MUSIC (multiple signal classification) direction-detecting device for uniform circular array
  • Two-dimensional MUSIC (multiple signal classification) direction-detecting device for uniform circular array
  • Two-dimensional MUSIC (multiple signal classification) direction-detecting device for uniform circular array

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Embodiment Construction

[0022] Such as figure 1 As shown, the device of the present invention is generally composed of an FPGA processing unit 101 and a DSP processing unit 102 . The core of the device is the DSP processing unit 102, which receives the covariance matrix containing the target orientation information from the FPGA processing unit 101. These covariance matrices are processed by the DSP processing unit 102 to obtain the orientation information of the target, and then the orientation information is transmitted to the FPGA processing unit 101 .

[0023] The function of the FPGA processing unit 101 is mainly composed of two parts: a, after filtering and denoising the signal received by the external antenna, calculate and generate a covariance matrix containing target orientation information; b, be responsible for storing the orientation information calculated by the DSP to the computer hard drive.

[0024] The DSP processing unit 102 is used to realize the two-dimensional MUSIC algorithm,...

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Abstract

The invention discloses a two-dimensional MUSIC (multiple signal classification) direction-detecting device for a uniform circular array, which comprises an FPGA (field programmable gate array) processing unit and a DSP (digital signal processor) processing unit, wherein the DSP processing unit is used for receiving a covariance matrix containing target azimuth information sent by the FPGA processing unit, utilizing a two-dimensional MUSIC algorithm to obtain the target azimuth information and sending the target azimuth information to the FPGA processing unit, and the FPGA processing unit is used for performing filtering noise-removing treatment on a signal received by an external antenna, and then calculating the covariance matrix containing the target azimuth information and storing the azimuth information calculated by DSP. According to the device, the two-dimensional MUSIC algorithm serves as a method for estimating the target azimuth, the calculating complexity in each step is reduced as much as possible, and the real-time direction-detecting capacity of the device is higher than that of the traditional device.

Description

technical field [0001] The invention belongs to the lightning monitoring system technology, in particular to a uniform circular array two-dimensional MUSIC (Multiple Signal Classification, multi-signal classification algorithm) direction finding device, which is especially suitable for the positioning of cloud flashes, and can be applied to high-speed real-time direction finding. Background technique [0002] In modern array signal processing, direction of arrival (DOA) estimation has been a hot and difficult point in research and implementation in recent decades, and it has a wide range of applications in radar, underwater sonar, mobile communication and electronic countermeasures. Traditional direction finding technology often uses phase information, amplitude information or a combination of phase and amplitude for direction finding processing. At present, the most widely used is the phase system, such as: cross-correlation phase interferometer, Doppler and so on. The cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/78
Inventor 马洪陈劲峰谭萍罗冶
Owner HUAZHONG UNIV OF SCI & TECH
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